Determine whether each statement describes mitosis, meiosis, or both mitosis and meiosis.

the number of
chromosomes
reduces by half

the dna is
replicated

occurs during
growth and
development

the number of
chromosomes
remains the same

occurs in
organisms that
sexually reproduce

occurs in
all organisms

How does secondary succession differ from primary succession?

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?

In what ways does the study of human population differ from the study of wildlife ecology